The sequel to Twenty Years After is titled Ten Years Later and consists of 288 chapters, which is divided into three parts. Part two is titled: Louise de La Vallière.
Raoul de Bragelonne, the son of Athos, finds that his childhood sweetheart, Louise de La Vallière, is a maid of honour to the Princess, daughter of Louis XIV. Fearing a tarnishing of her reputation by the affairs which take place in such a role, Raoul seeks to marry her.
His father disapproves at first but eventually agrees. The king, however, refuses to sanction the marriage because Louise is of inferior social status, and so marriage is delayed, which sets off a series of events portrayed in the book.